This is the CC and Ex subdomains found in PH-CC-Ex globular domain from Tiam1 and Tiam2 proteins (T-lymphoma invasion and metastasis). The CC subdomain forms an antiparallel coiled coil with two long alpha-helices, together with the C-terminal Ex subdomain they form a small globular domain comprising three alpha-helices. The CC subdomain of the Tiam2 PHCCEx domain follows the C-terminal alpha1 helix of the PH Pfam:PF00169 subdomain through a four-residue linker [1].

1: The PHCCEx domain of Tiam1/2 is a novel protein- and membrane-binding module. Terawaki S, Kitano K, Mori T, Zhai Y, Higuchi Y, Itoh N, Watanabe T, Kaibuchi K, Hakoshima T; EMBO J. 2010;29:236-250. PMID:19893486

2: High-resolution structure of the Tiam1 PHn-CC-Ex domain. Joshi M, Gakhar L, Fuentes EJ; Acta Crystallogr Sect F Struct Biol Cryst Commun. 2013;69:744-752. PMID:23832200